Thursday, May 5, 2011

GK_BLAST GKB_Q115

GKB_Q115
Q-The reflex angle between the hands of a clock at 10:25 is ?(in degree)

(Note: At 10:25, hour hand is not at sharp 10)



The angle between hands is 180+?
Now the problem is to find ?=x
.
.
.
We know that hour hand covers 30 degree in one hour and minute hand covers 360 degree in one hour.
     360 degree of minute hand = 30 degree of hour hand
(in 25 minute, minute hand covers 150 degree)
So 150 degree of minute hand = (30*150)/360 degree of hour hand
Hence hour hand cover 12.5 degree.
So
x=30-12.5=17.5 degree
Therefore, total angle between hands is 180+17.5=197.5 degree

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